[patch] gdbserver: Add support for Z0/Z1 packets

[Aleksandar Ristovski <aristovski@qnx.com>]

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Hello,

This adds support for Z0 and Z1 (and z0 and z1) packets.

Thanks,

-- 
Aleksandar Ristovski
QNX Software Systems

ChangeLog:


* target.h (insert_breakpoint, remove_breakpoint): New 
target functions.
* server.c (handle_query): 'Z' and 'z' packet - add support
for [Zz]0 and [Zz]1 - software and hardware breakpoints.
* linux-low.c (linux_target_ops): Add new fields.
* spu-low.c (spu_target_ops): Likewise.
* win32-low.c (win32_target_ops): Likewise.

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Index: target.h
===================================================================
RCS file: /cvs/src/src/gdb/gdbserver/target.h,v
retrieving revision 1.36
diff -u -p -r1.36 target.h
--- target.h	1 Apr 2009 22:50:24 -0000	1.36
+++ target.h	17 Jun 2009 01:11:04 -0000
@@ -228,6 +228,14 @@ struct target_ops
 
   int (*stopped_by_watchpoint) (void);
 
+  /* Insert and remove breakpoint.  Argument TYPE can be:
+       '0' = software-breakpoint
+       '1' = hardware-breakpoint 
+     Returns 0 if successful, 1 otherwise.  */
+
+  int (*insert_breakpoint) (char type, CORE_ADDR addr);
+  int (*remove_breakpoint) (char type, CORE_ADDR addr);
+
   /* Returns the address associated with the watchpoint that hit, if any;
      returns 0 otherwise.  */
 
Index: server.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbserver/server.c,v
retrieving revision 1.97
diff -u -p -r1.97 server.c
--- server.c	24 May 2009 21:06:53 -0000	1.97
+++ server.c	17 Jun 2009 01:11:05 -0000
@@ -1106,7 +1106,8 @@ handle_query (char *own_buf, int packet_
       if (the_target->qxfer_osdata != NULL)
 	strcat (own_buf, ";qXfer:osdata:read+");
 
-      strcat (own_buf, ";multiprocess+");
+      if (multi_process)
+	strcat (own_buf, ";multiprocess+");
 
       if (target_supports_non_stop ())
 	strcat (own_buf, ";QNonStop+");
@@ -2373,28 +2374,48 @@ process_serial_event (void)
 	CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
 	int len = strtol (lenptr + 1, &dataptr, 16);
 	char type = own_buf[1];
+	int res = -1;
+
+	/* Type: '0' - software-breakpoint
+		 '1' - hardware-breakpoint
+		 '2' - write watchpoint
+		 '3' - read watchpoint
+		 '4' - access watchpoint  */
 
-	if (the_target->insert_watchpoint == NULL
-	    || (type < '2' || type > '4'))
+	if (type < '2' && type >= '0')
 	  {
-	    /* No watchpoint support or not a watchpoint command;
-	       unrecognized either way.  */
-	    own_buf[0] = '\0';
+	    /* Insert breakpoint.  */
+	    if (the_target->insert_breakpoint == NULL)
+	      {
+		/* Not supported.  */
+		own_buf[0] = '\0';
+		res = 1;
+	      }
+	    else
+	      res = (*the_target->insert_breakpoint) (type, addr);
 	  }
 	else
 	  {
-	    int res;
-
-	    require_running (own_buf);
-	    res = (*the_target->insert_watchpoint) (type, addr, len);
-	    if (res == 0)
-	      write_ok (own_buf);
-	    else if (res == 1)
-	      /* Unsupported.  */
-	      own_buf[0] = '\0';
+	    if (the_target->insert_watchpoint == NULL)
+	      {
+		/* No watchpoint support or not a watchpoint command;
+		   unrecognized either way.  */
+		own_buf[0] = '\0';
+		res = 1;
+	      }
 	    else
-	      write_enn (own_buf);
+	      {
+		require_running (own_buf);
+		res = (*the_target->insert_watchpoint) (type, addr, len);
+	      }
 	  }
+	if (res == 0)
+	  write_ok (own_buf);
+	else if (res == 1)
+	  /* Unsupported.  */
+	  own_buf[0] = '\0';
+	else
+	  write_enn (own_buf);
 	break;
       }
     case 'z':
@@ -2404,28 +2425,48 @@ process_serial_event (void)
 	CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
 	int len = strtol (lenptr + 1, &dataptr, 16);
 	char type = own_buf[1];
+	int res = -1;
 
-	if (the_target->remove_watchpoint == NULL
-	    || (type < '2' || type > '4'))
+	/* Type: '0' - software-breakpoint
+		 '1' - hardware-breakpoint
+		 '2' - write watchpoint
+		 '3' - read watchpoint
+		 '4' - access watchpoint  */
+
+	if (type < '2' && type >= '0')
 	  {
-	    /* No watchpoint support or not a watchpoint command;
-	       unrecognized either way.  */
-	    own_buf[0] = '\0';
+	    /* Remove breakpoint.  */
+	    if (the_target->remove_breakpoint == NULL)
+	      {
+		/* Not supported.  */
+		own_buf[0] = '\0';
+		res = 1;
+	      }
+	    else
+	      res = (*the_target->remove_breakpoint) (type, addr);
 	  }
 	else
 	  {
-	    int res;
-
-	    require_running (own_buf);
-	    res = (*the_target->remove_watchpoint) (type, addr, len);
-	    if (res == 0)
-	      write_ok (own_buf);
-	    else if (res == 1)
-	      /* Unsupported.  */
-	      own_buf[0] = '\0';
+	    if (the_target->remove_watchpoint == NULL)
+	      {
+		/* No watchpoint support or not a watchpoint command;
+		   unrecognized either way.  */
+		own_buf[0] = '\0';
+		res = 1;
+	      }
 	    else
-	      write_enn (own_buf);
+	      {
+		require_running (own_buf);
+		res = (*the_target->remove_watchpoint) (type, addr, len);
+	      }
 	  }
+	if (res == 0)
+	  write_ok (own_buf);
+	else if (res == 1)
+	  /* Unsupported.  */
+	  own_buf[0] = '\0';
+	else
+	  write_enn (own_buf);
 	break;
       }
     case 'k':
Index: linux-low.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbserver/linux-low.c,v
retrieving revision 1.105
diff -u -p -r1.105 linux-low.c
--- linux-low.c	24 May 2009 17:44:19 -0000	1.105
+++ linux-low.c	17 Jun 2009 01:11:05 -0000
@@ -3027,6 +3027,8 @@ static struct target_ops linux_target_op
   linux_insert_watchpoint,
   linux_remove_watchpoint,
   linux_stopped_by_watchpoint,
+  NULL,  /* insert_breakpoint */
+  NULL,  /* remove_breakpoint */
   linux_stopped_data_address,
 #if defined(__UCLIBC__) && defined(HAS_NOMMU)
   linux_read_offsets,
Index: spu-low.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbserver/spu-low.c,v
retrieving revision 1.24
diff -u -p -r1.24 spu-low.c
--- spu-low.c	3 Apr 2009 14:38:39 -0000	1.24
+++ spu-low.c	17 Jun 2009 01:11:05 -0000
@@ -615,6 +615,8 @@ static struct target_ops spu_target_ops 
   NULL,
   NULL,
   NULL,
+  NULL, /* insert_breakpoint */
+  NULL, /* remove_breakpoint */
   NULL,
   NULL,
   NULL,
Index: win32-low.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbserver/win32-low.c,v
retrieving revision 1.35
diff -u -p -r1.35 win32-low.c
--- win32-low.c	1 Apr 2009 22:50:24 -0000	1.35
+++ win32-low.c	17 Jun 2009 01:11:05 -0000
@@ -1700,6 +1700,8 @@ static struct target_ops win32_target_op
   NULL,
   NULL,
   NULL,
+  NULL, /* insert_breakpoint */
+  NULL, /* remove_breakpoint */
   NULL,
   NULL,
   NULL,